{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["Chemical"], "input": "Aromatics were disproportionately accumulated over aliphatics and were the main contributors to toxicity ; therefore , aromatics and aliphatics should be regulated separately ."}
{"Chemical": []}